function showandhide(id){
	var id=document.getElementById(id);
	id.style.display=(id.style.display=='none')?'block':'none';
}
function changeborder(color,id){
	var id=document.getElementById(id);
	with(id){
		style.borderColor=color;
		style.color=color;
	}
}
function resizeEditor(id,change) {
	var id=document.getElementById(id);
	var newheight = parseInt(id.style.height,10) + change;
	if(newheight >= 100) {
	id.style.height = newheight + 'px';
	}
}
function changetext(id){
	switch(id){
		case "00":
		addtext('<b></b>');
		break;
		case "01":
		addtext('<i></i>');
		break;
		case "02":
		addtext('<u></u>');
		break;
		case "03":
		showandhide('showcolor');
		break;
		case "04":
		addtext('<div style="text-align:left;"></div>');
		break;
		case "05":
		addtext('<div style="text-align:center;"></div>');
		break;
		case "06":
		addtext('<div style="text-align:right;"></div>');
		break;
	}
}
function addtext(value){
	document.form_content.art_content.value=form_content.art_content.value+value;
	document.form_content.art_content.focus();
}

function changeClass(id,n_id){
	switch(n_id){
		case "viewfirst":
		document.getElementById("input_content").style.display="block";
		document.getElementById("view_content").style.display="none";
		document.getElementById("input_btn").style.display="block";
		break;
		case "viewcode":
		document.getElementById("input_content").style.display="none";
		document.getElementById("view_content").style.display="block";
		document.getElementById("input_btn").style.display="none";
		var htmls=form_content.art_content.value;
		var html=htmls.replace(/\n/g,"<br />");
		document.getElementById("view_content").innerHTML=html;
		break;
	}
	n_id=document.getElementById(n_id);
	
	id.className='btn_down';
	n_id.className='btn_up';
}
function addcolor(color){
	addtext("<span style='color:#"+color+"'></span>");
	showandhide('showcolor');
}

function setMaxSize(w,h,obj){
	var oWidth=obj.offsetWidth;
	var oHeight=obj.offsetHeight;
	if(oWidth>w){
		obj.width=w;
		obj.height=w*(oHeight/oWidth);
	}
	if(obj.height>h){
		obj.height=h;
		obj.width=h*(oWidth/oHeight);
	}
}
	
function CheckForm(form){
	var form=eval("document."+form);
	for(i=0;i<form.elements.length;i++){
		var words=form.elements[i].title
		if(form.elements[i].value=='' && words){
			alert(words);
			form.elements[i].focus();
			return false;
		}
	}
	return true;
}